Home / 1,987.28-2,742.26-1,103.07

Finding the Fourth Proportional to 1,987.28, 2,742.26 and 1,103.07

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Solution

The fourth proportional to 1,987.28, 2,742.26 and 1,103.07 is: 1,522.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,987.28 : 2,742.26 = 1,103.07 : x
  2. Step 2: Convert to fraction form
    1,987.28/2,742.26 = 1,103.07/x
  3. Step 3: Cross multiply
    1,987.28x = 2,742.26 × 1,103.07
  4. Step 4: Simplify right side
    1,987.28x = 3,024,894.08
  5. Step 5: Solve for x
    x = 3,024,894.08/1,987.28
  6. Step 6: Final answer
    x = 1,522.12

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.